Outlander stars Caitriona Balfe and Sam Heughan can’t seem to keep a straight face while on location in Scotland, giggling like schoolchildren as they make farting noises with their mouths during several different points in production.

Also in the gag reel, a horse decides to relieve itself while co-star Graham McTavish stands right next to it and Heughan’s mare has other ideas about its stride.

To cap it all off, Balfe and Heughan have trouble getting through a dramatic scene, especially when she has to say this unintentionally absurd line: “Is this bite from a... monkey?” Watch the video above to see all the hilarious bloopers!

Outlander season two is available on DVD/Blu-ray on Nov. 1, and digitally on Oct. 31.